1 Timoteo 5:8

But if any man provideth not for his own, and specially his own household, he hath denied the faith, and is worse than an unbeliever.

Spence has the following comment on this verse:

The circle of those whose support and sustenance were the responsibility of the Christian is here enlarged. Not merely parents and grandparents, but "he must assist those of his own house." Even dependents connected with the family who may have fallen into poverty and neglect are included.[8]

Charity begins at home, and so do all other obligations of the Christian life. As White said:

One of the most subtle temptations of the devil is his suggestion that we can best comply with the demands of duty in some place far away from home. Jesus always said, "Do the next thing; begin at Jerusalem, etc." The path of duty begins from within our own house, and we must walk it on our own street.[9]

[8] H. D. M. Spence, op. cit., p. 202.

[9] Newport J. D. White, Expositor's Greek Testament, Vol. IV (Grand Rapids, Michigan: Wm. B Eerdmans Publishing Company, 1967), p. 128.